Mason jar



FIG. 1 is a perspective view of the top, front, and right side of a mason jar;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines are shown for the purpose of illustrating unclaimed portions of the mason jar and form no part of the claimed design. 

CLAIM The ornamental design for a mason jar, as shown and described. 